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From: | Evgeny Voevodin |
Subject: | Re: [Qemu-devel] [RFC][PATCH v2 4/4] configure: add CONFIG_QEMU_LDST_OPTIMIZATION for TCG qemu_ld/st optimization |
Date: | Fri, 06 Jul 2012 07:13:35 +0400 |
User-agent: | Mozilla/5.0 (X11; Linux i686; rv:13.0) Gecko/20120615 Thunderbird/13.0.1 |
On 05.07.2012 17:55, Andreas Färber wrote:
Am 05.07.2012 15:23, schrieb Yeongkyoon Lee:Add an option "--enable-ldst-optimization" to enable CONFIG_QEMU_LDST_OPTIMIZATION macro for TCG qemu_ld/st optimization. It only works with CONFIG_SOFTMMU and doesn't work with CONFIG_TCG_PASS_AREG0. Signed-off-by: Yeongkyoon Lee <address@hidden> --- configure | 15 +++++++++++++++ 1 files changed, 15 insertions(+), 0 deletions(-) diff --git a/configure b/configure index 9f071b7..2b364cc 100755 --- a/configure +++ b/configure[...]@@ -3463,6 +3466,11 @@ echo "EXESUF=$EXESUF" >> $config_host_mak echo "LIBS_QGA+=$libs_qga" >> $config_host_mak echo "POD2MAN=$POD2MAN" >> $config_host_mak+if [ "$ldst_optimization" = "yes" -a "$cpu" != "i386" -a "$cpu" != "x86_64" ] ; then+ echo "ERROR: qemu_ld/st optimization is only available on i386 or x86_64 hosts" + exit 1 +fi[snip] I assume that Samsung is interested in optimizing the Exynos emulation.
Nope ) Originally it's from x86 Tizen emulator )
I think there was already a patchset posted converting target-arm to CONFIG_PASS_TCG_AREG0, only with some slowdowns to be investigated... What is the obstacle for supporting AREG0 mode in your optimization? Regards, Andreas+ # generate list of library paths for linker script$ld --verbose -v 2> /dev/null | grep SEARCH_DIR > ${config_host_ld}@@ -3696,11 +3704,18 @@ fi symlink "$source_path/Makefile.target" "$target_dir/Makefile"+target_ldst_optimization="$ldst_optimization"+ case "$target_arch2" in alpha | sparc* | xtensa* | ppc*) echo "CONFIG_TCG_PASS_AREG0=y" >> $config_target_mak + # qemu_ld/st optimization is not available with CONFIG_TCG_PASS_AREG0 + target_ldst_optimization="no" ;; esac +if [ "$target_ldst_optimization" = "yes" -a "$target_softmmu" = "yes" ] ; then + echo "CONFIG_QEMU_LDST_OPTIMIZATION=y" >> $config_target_mak +fiecho "TARGET_SHORT_ALIGNMENT=$target_short_alignment" >> $config_target_makecho "TARGET_INT_ALIGNMENT=$target_int_alignment" >> $config_target_mak
-- Kind regards, Evgeny Voevodin, Technical Leader, Mobile Group, SMRC, Samsung Electronics e-mail: address@hidden
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